Urban Developer Integrated Water Management From the sub-allotment to the subdivision

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1 Urban Developer Integrated Water Management From the sub-allotment to the subdivision Dr Matthew Hardy Environmental Engineer - BMT WBM ewater Urban Product Leader

2 Supporting Better Decision-making in Urban Water Policy frameworks and decisions are becoming increasingly complex Regulators are encouraging alternatives options and more efficient use of water resources Increased stakeholder engagement further complicates decision making processes Solutions emphasise integrated or total water cycle management for purpose of water sensitive urban design

3 More Precisely Some of the Decisions Faced Are Design Decision What infrastructure will meet strormwater peak flow reduction and detention requirements? meet stormwater quality improvement targets? reduce consumptions of mains supply? decrease runoff days to local streams? maximise developable land..? Policy Decisions Which management options should we invest in to meet out mains water consumption targets, at what scale? reduce ecological impacts of urban development on our catchment? improve local and regional water security? increase the longevity of our existing infrastructure?

4 Tools for Integrated Water Management High enterprise Complexity of NRM challenge utility system Low individual team organisation industry Users

5 What Does Offer? Integration of modelling across the water cycle Stormwater runoff generation Stormwater constituent generation Improved representation of urban demand Stormwater constituent treatment Waste water generation and re-use Enhanced user interface and database tools Multi-replicate climate simulation Comparison and analysis at a range of scales Reporting utilities

6 With You Can... Build and modelling the existing water management infrastructure stormwater water supply waster water or even a third pipe supply Apply it to both greenfield and brownfield sites

7 With You Can... Draw on MUSIC water quality modelling tools Simulate water quality constituents Explore stormwater quality treatment options

8 With You Can... Explore management options at a range of scales Subdivision

9 With You Can... Explore management options at a range of scales Cluster

10 With You Can... Tank Impervious Area Explore management options at a range of scales Mains Supply In Roof Water Use Node Stormwater Out Allotment Waste Water Out

11 In Summary Some of the key differentiating features of Urban Developer are the Integration of water quantity and quality across the entire water cycle Improved representation of urban demand An ability to informatively link system operations across scales Flexibility with respect to network configuration and definition; and Support for multi-replicate simulation

12 How can you find out more? MUSIC Version 4 now available - Improved science - Usability enhancements - More licensing options More information at

13 An Allotment Scale IUWM Problem What is the impact of a 8KL Rainwater Tank on the maximum peak discharges from a typically residential property Roof 200m 2 Rainwater Tank 8kL, 2kL of detention storage and starts empty Impervious Area 200m 2 House Hold Appliances AAA Shower Front Loader Washing Machine Duel Flush 11/6 Toilet The house uses rainwater to supply outdoor, toilet, and laundry usage.

14 Setting up the Water Use Model 1. Water Use node added 2. Tank is connected to water use 3. Node properties and supply preferences are set 1

15 Finalising the system model 2 1. Impervious area and receiving nodes are added and connected 2. Node properties are set

16 Compare the impacts of the tank on runoff Contrast of stormwater runoff time series with (red) and without (blue) rainwater tank

17 Comparing the impacts of the tank on mains water use Contrast of mains water supply time series with (red) and without (blue) tank supply

18 Comparing MUSIC and Urban Developer Functionality MUSIC Urban Cluster Tool User benefit of Cluster v MUSIC Spatial Scale Spatial Resolution 0.1 ha 1000 s ha Allotment Subdivision ha 1000 s ha Sub-Allotment Subdivision Supports the representation the urban water cycle at sub-allotment resolution. This offers increased flexibility for representation and exploration of features such as lot-based grey water systems, stormwater management devices and enduse consumption dynamics Temporal Scale Minutes Daily Seconds Daily Support for sub-minute simulation to capture peak discharge/flow dynamics Climatic Simulation Water Cycle Elements Covered Primary Application Single Replicate Multi-Replicate Facilitates the exploration of climate variability and model uncertainty Stormwater and Surface Water Quality Conceptual Design of Water Quality Treatment Trains Stormwater, Surface Water Quality, Water Supply, Demand and End-Use, and Waste Water (Grey, Black Water etc) Conceptual and preliminary design of integrated solutions for the provision of urban water cycle service 1 The cluster tool includes a broader representation of the urban water cycle to supported the assessment integrated urban water management (IUWM) strategies

19 Comparing MUSIC and Urban Developer Functionality MUSIC Urban Cluster Tool User benefit of Cluster v MUSIC Hydrological Simulation Hydraulic Simulation Simulation of System Feedbacks, i.e. Recycling loops Demand and End- Use Simulation Water Balance (Continuity) Muskingum-Cunge Channel and Stream Flow Water Balance (Continuity) Kinematic Wave Surface Flow Pipe and Channel Routing Muskingum-Cunge Channel and Stream Flow Lumped Storage Routing All distributed storage (eg. RW tanks) Both offer accepted methodologies for the representation of the hydrological processes The cluster tool includes additional flow routing capabilities, including the representation of pipe networks for stormwater, water supply and wastewater NA Supported Feedback loops support the simulation of recycling and reuse strategies such as purified recycled water (PRW) systems User-Specified Total House/Tank Demand Probabilistic Behavioural Water Use Model of individual end uses (outdoor, shower, washing machine etc) Improved representation of urban water demand. More robust estimates of decentralised management strategies (e.g. demand management, water savings appliances etc) 1 Urban water cycle services are defined as the stormwater, water supply and waste services